With the new 2018 A7 Sportback just being revealed, Audi is already looking at making an RS edition and thanks to @motorauthority we can see potential changes from the A7 to the RS7.
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Expect it to keep Audi's renowned Quattro system but to have more aggressive styling and power. It is expected to come in two trims, a hybrid and a petrol edition. The petrol model is expected to 650bhp, up from 605bhp from the A7, but the hybrid is expected to have monstrous 700bhp. The hybrid variant will get it's power from a Porsche Panamera Turbo S E-Hybrid Twin Turbo 4.0L V8 engine and a 14 kW h Lithium-Ion battery. The petrol RS7 will get the same engine but without the electric motors.
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Due to still being in early development Audi is using a modified A7 body shell but we can still make predictions on visual changes. For example the makeshift fenders show that the RS7 will have bigger wheels so the body of the RS7 will be wider and will have different rims which are on the test mule. Also the wheels being used barely fit inside the A7's wheel arches which would need to be made bigger. Also Audi's signature oval exhaust-tips are present which implies a more powerful engine.
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Other visual changes can be assumed based on other Audi RS models. New, more aggressive ducktail spoiler, front fascia, rear fascia, diffuser, front splitter, bonnet and headlights will all likely feature on the RS7 and give a more aggressive look. Also expect a lot of Carbon Fibre to appear on the RS7 as options.
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The RS7 will be ready for 2019 but expect it to be released towards the end of 2018. I can't wait to see it in the flesh as Audi's RS models tend to look a lot better than their already beautiful base models. I added photos of the A7 for you to make a comparison between the two for yourself and stay tuned for the inevitable mules of the RS7 yet to come.